キャッシュ

• Reading: キャッシュ
• Romaji: kyasshu
• Pronunciation: /kja.s.shu/

Meaning

Cache — stored data that can cause apps or websites to behave strangely or slow things down.

A loanword from English 'cache,' キャッシュ in everyday tech conversation refers to the temporary data stored by browsers, apps, and operating systems. It is most commonly encountered as the target of troubleshooting advice: 「キャッシュを消してみて」 (try clearing the cache) is one of the most universally given fixes for app problems in Japan. Note that キャッシュ also means 'cash (money)' in Japanese — context distinguishes the two.

Examples

1. アプリ重いならキャッシュ消してみたら？ If the app is running slow, why not try clearing the cache?
2. ブラウザのキャッシュをクリアしたら表示が直った。 I cleared my browser cache and the display issue was fixed.
3. キャッシュが溜まりすぎてスマホの容量がやばい。 My phone storage is in trouble because too much cache has built up.

Usage Guide

Context: tech support, everyday conversation, social media

Tone: practical, troubleshooting

Do Say

• とりあえずキャッシュ消してみて、それで直ることが多いから。 (Try clearing the cache first — that fixes it most of the time.)
• キャッシュが原因で古い情報が表示されてた。 (Old info was showing up because of the cache.)

Don't Say

• キャッシュとクッキーを混同しない — キャッシュは一時ファイル、クッキーはサイトごとの保存データ (Don't confuse キャッシュ with クッキー — cache is temporary files, cookies are per-site saved data)

Common Mistakes

• Confusing キャッシュ (cache) with キャッシュ (cash/money) — both are written the same way; rely on context
• Assuming clearing the cache always fixes every problem — it's a first step, not a cure-all

Origin & History

Borrowed from English 'cache' (computing). The term became common in Japanese consumer tech vocabulary in the 2000s as smartphones and web browsers became ubiquitous. The advice to clear one's cache became a standard first-line tech support response.

Cultural Context

Era: 2000s onwards

Generation: All ages

Social background: Universal

Regional notes: Used across all of Japan. Clearing the cache is so commonly advised that it has become something of a running joke online.